Paper-bag machine.



No. 718,143. I PATENTED JAN. 13, 1903.

' S. T. MURGHIE.

PAPER BAG MACHINE.`

APPLIoATloN FILED JUNE 4, 1901.

me Nonms Eriks co.. Pno'roufua.. wAsHmoTcn o L No. 718,143. 4 K PATENTED JAN. 13, 1903.

' S. T. M URGHIB.

PAPER BAG MACHINE.

APPLIOATION FILED JUNE 4, 1901. H0 MODEL.

2 SHEETS--SHEBT 2.

Vz' 65.565.' I Inventor.'

T NE ohms Prnzks pHoro-umu., WASHINGTON u c IINiTEn STATES PATENT OFFICE.`

SYLVANUS T. MURCHIE, OFKAUKAUNA, WISCONSIN, ASSIGNOR TO THEy UNION BAG da PAPER COMPANY, OF JERSEY CITY, NEW JERSEY, A

CORPORATION OF NEW JERSEY.

PAPER-BAG MACHIN E.

SPECIFICATION forming part oi Letters Patent o. 718,143, dated January 13, 1903.

Application filed June 4, 1901.

To all whom it may concern:

Be it known that I, SvLvANUs T. MURCHIE, a citizen of the United States of America, residing in Kaukauna, in the county of Outagamie, in the State of Wisconsin, have invented certain new and useful Improvements in Paper-Bag Machines, of which the following is a true and exact description, reference being had to the accompanying' drawings, which form a part thereof.

My invention relates to paper bag machines, and, as shown, is particularly, though not exclusively, designed for use in connection with and as an improvement upon such machines as are described in my prior patents, Nos. 585,280, of June29, 1897, and 587,135, ofY July 27, 1897, the object of my present invention being to provide in connection with distending rolls, whether suction rolls or otherwise, gripping-ngers which will move to engage and disengage the'blanks with great ease, rapidity, and accuracy, the leading feature of my `invention consisting in securing the gripping-fingers to the longer arms of pivoted levers secured to the distendingvrolls orA parts moving therewith and extending past the centers of the said rollers, the shorter arms of such levers being acted on to move the fingers.

The nature of my improvements as a whole will be best understood as described in connection with the drawings in which they are illustrated, and in which- Figure l is a plan view of a part of a paper-bag machine embodying my invention. Fig. 2 is a side elevation on the section-line 2 2 of Fig. l. Fig. 3 is a front view. Fig. 4 is a section on the line 4 4of Fig. 2, and Fig. 5 is a View showing a modiication in the construction of the finger-carrying lever and its attachment to the shaft of a distending-roll.

Aand A indicate the side frames of the machine, connected, as shown in the part of the machine illustrated, by a cross-bar A2.

` B B and C C are feed-rolls.

D D andy D D are cam-rollers secured on the shafts of the feed-rolls C C and having Serial No. 63,102. (No model.)

lateral cam-surfaces, (indicated at d d and d d.)

E E indicate the distending-rolls, which, as illustrated, are suction-rolls having hollow shafts E', connecting through air-tight bearings in the frame A' with the branches F F of the suction-pipe F.

G is a feeding and pressing 'roll which, in connection With the lower distending-roll E, withdraws the blank and presses out the dia mond fold after it is formed by the distending-rolls. As shown in the construction illustrated in Figs. l to 4 inclusive, the shafts E' of the hollow studs, indicated at E2, (best shown in Figs. 2 and 4,) extend through them. The rolls are also provided with perforations, (indicated at E3, Fig. 4,) and the shafts with bearings, (indicated at E4.)

II indicates the'train of gear-Wheels, by which the various parts are connected together and which being of usual construction need not be particularly described.

I I and t' t' are levers pivoted eccentrically in the hollow studs EE and extending, as shown, through the shaft, I indicating the shorter ends of the levers,and I2 the pivots upon which they turn.

I3 11S indicate the gripping-lingers, secured .to the longer ends of the levers I, and it will be noticed that the shorter ends of the levers are provided with longitudinally-extending slots at their ends.

J is a plunger working in the perforations E3 and pressed out by a spring J against the shorter ends of the linger-carrying levers, the action of the spring tending to press the shouldered end of the lever out and throw the longer end of the lever with the finger in and into position to engage the bellows-folded blank..

K is a plunger working in the bearing E4 and connected with the slotted end I of the lever I by a pin K.V

L L and Z l are studs or pillars extending upward from the cross-bar A2 and having pivoted upon their upper ends the levers M M and fm m', said levers being eccentrically pivoted and having cam-rollers M2 m2 resting against the cams d d' of the cam-rolls D D', the longer ends of the said levers having` attached to them the annular plates M3 'm3, which extend around the hollow shafts'E E and rest against the plungers K K.

The operation of the device is easily foltion at the proper time for throwing the finp gers in, and as soon as the cam-rolls pass over` the edge of the elevated portion of the cam the springs J' come into active operation, forcing the shorter ends of the levers I i out and the longer ends in, the eccentric pivoting of the levers I M permitting this to occur with great rapidity, and obviously the same construction causes the withdrawal of the fingers with equal rapidity when the elevated portion of the cam again comes into operation on the cam-rolls.

In Fig. 5 I have illustrated a modification in which instead of having a hollow stud passing through the hollow shaft of the distending-roll I form the finger-lever with an annular center, (indicated at 14,) which passes around the hollow shaft and is pivoted thereto by pivot-screws I5, as shown. Obviously the operation of this device is in all respects the same as that shown in the other gures of the drawings.

I am aware that pivoted gripping-fingers acting on a bag-blank as do my lingers have heretofore been employed; but by securing my lingers on levers'eccentrically pivoted, as described, and extending past the centers of the rolls I am enabled at the same time to secure great rapidity in the action of the fingers and great ease in their operation. To explain: Itis of con rse obvious that the speed of movement of the gripping-lingers, other factors remaining constant, will be determined by the relative lengths of the short and long arms of the pivoted lever to which the linger is attached. Again, itis clear that it is not advisable to make the shorter leverarm unduly short, and assuming that this arm is given its minimum length consistent with good mechanics the speed of movement of the linger on the end of the long lever-arm will be determined by the length of the lever as a whole. Now by my new construction, in which I carry the lever across the center of the roll, I am enabled to use a much longer nger-lever than was possible in older constructions, in which the lever lay entirely on one side of the roll-center, and consequent] y my construction makes it possible to flavie give the finger a more rapid movement; but the shorter the lesser arm of the lever is made the more power is required to move it and the greater the strains to which the pivot and connected parts are exposed. Hence by increasing the length of the lever, leaving the proportion of the arms the same, the strain will obviously be diminished, and my novel construction enables me to secure the maximum desirable rapidity with the least possible strain, as it enables me at the same time to increase the actual length of the shorter lever-arm and to decrease its proportional length to the longer arm. For these reasons my machine combines great rapidity and ease of operation.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In a paper-bag machine, the combination with distending-rolls of levers pivoted eccentrically on each side of the rolls and extending past the centers thereof, lingers secured to the longer ends of said levers adapted to clamp the blanks to the roll in one position of the levers and means for actuating said levers to engage and disengage the blanks as the rolls revolve, said means acting on the shorter ends of the levers.

2. In a paper-bag machine, the combination lwith distending-rolls of levers pivoted eccentrically on each side of the rolls and extending past the centers thereof, tin gers secured to the longer ends of said levers adapted to clamp the blanks to the roll in one position of the levers, springs acting on the shorter ends of the levers to move the fingers into engaging position and cam-actuated mechanism acting also on the shorter ends of the levers to move and hold the fingers out of operation.

5. In a paper-bag machine, the combination with distending-rolls of levers pivoted eccentrically on each side of the shaft and extending substantially from side to side of the rolls, fingers secured on the longer ends of the levers and adapted to clamp the corners of a bellows-folded blank thereto, annular plates, as M3, arranged to act against the shorter ends of the levers and cam mechanism for moving the plates toward and away from the ends of the rolls.

4. In a paper-bag machine, the combination with distending-rolls of levers pivoted eccentrically on each side of the shaft and extending substantially from side to side of the rolls, fingers secured on the longer ends of the levers and adapted to clamp the corners of a bellows-folded blank thereto, annular plates, as M3, arranged to act against the shorter ends of the levers, pivoted levers to which said annular plates are secured and cams acting on saidlevers to move the plates and tinger-levers.

5. In a paper-bag machine, the combination with distending-rolls of levers pivoted eccen- IOO trcally ou each side of the shaft and extendare secured and cams acting on the shorter ing substantially from side to side of the rolls, ends of said levers to move the plates and nto fingers secured on the longer ends of the leger-levers. vers and adapted to clamp the corners of a 5 bellows-folded blank thereto, annular plates,

as M3, arranged to act against', the shorter Witnesses: ends ofthe levers, ecoentrcally-pivotedlevers THOS. A. CLANCY, to the longer ends of which said annular plates G. H. DAWSON.

SYLVANUS T.. MURoi-IIE. 

